# File lib/facter/util/vlans.rb, line 10
  def self.get_vlans
    if (config = self.get_vlan_config)
      vlans = []
      config.each_line do |line|
        if (match = line.match(/^([0-9A-Za-z]+)\.([0-9]+) /))
          vlans << match[2] if match[2]
        end
      end
      vlans.join(',') unless vlans.empty?
    end
  end